Free calendar server? [closed]

I am looking for free calendar server who can authenticate to LDAP server. I want our users to use thunderbird lightning with calendar server. We have mail server with devcot and squirlmail for webmail. Could you recommend me calendar server?

Solution 1:

The DAViCal CalDAV server will probably do what you're looking for (and has LDAP authentication). I use it with Mozilla Sunbird and it works great.

Solution 2:

Zimbra has it all

Solution 3:

We use the Horde framework, which also has programs for calendaring, tasks, e-mail, and a bunch of others. Horde.org is the place to go.

Solution 4:

zarafa (http://www.zarafa.com) is a great exchange replacement. You can even synchronize smartphones with it using z-push.